Radiator



Patented Apr. 18, 1933 UNITED. STATES PATENT orrlcr.

JOHN D. SOEHNER,

.OF ST. ALBANS, NEW YORK, ASSIGNOR, BY

MESNE ASSIGNMENTS,

RADIATOR Application filed March 18, 1930. Serial No. 436,689.

The invention provides a radiator in which certain sheet metal parts are applied in a new way which facilitates the manufacture of the radiator and effects certain improvements in the finished structure.

Fig. 1 is a front elevation and Fig. 2 is a plan of a radiator.

Fig. 3 is an enlarged plan illustrating the original'shape of the sheet metal parts. Fig. 4 is a detail in plan of a finished joint.

Figs. 5 and 6 are elevations of the separate sheet metal parts.

Fig. 7 is a plan-of a modification.

Fig. 8 is a plan of another modification.

Fig. 1 illustrates a radiator of the Murray type, the heating element being a tube 11 extending back and forth in several sections, and an extended area of sheet metal being applied to the opposite sides forming vertical passages for heating and inducing a draft of the heated air. The apparatus may be used also for cooling the air by circulating brine through the tube, and may be used for various other purposes. When used as a heater, electrical or other heating elements may be used in place of the steam pipe. The present invention is directed chiefly to the securing of the extended area.

As shown, lateral fins 12 are formed in pairs connected at their outer edges by longitudinal portions 13 and having at their inner edges longitudinal portions .14 which are bent'outward at intervals into recessed portions 15 embracing the pipe 11. Two such sheet metal'units are assembled as in Fig. 3, with their inner portions 14 in contact above and below the pipe sections. The free edges of the portions 14 are then crimped together to form joints indicated as a whole at 16. x

For this purpose the edges are originally shaped as in Figs. 3, 5 and 6. At one side is a short backward flange 17 and at the other side a longer forward flange 18 overlapping the flange 17 By means of ordinary crimping tools the flange 18 is pressed around the edge of the flange 17 after which the triple flange thus formed is pressed down in the manner shown in Fig.

4. Any other usual or suitable style of crimping may be resorted to.

The crimping operation draws the opposite sheet metal units close together and effects a good heat conducting engagement of the portions 15 with the pipe. One pair of sheet metal units after another is crimped on the pipe until the full length of the'radiator is completed.

Each sheet metal unit may consist of two or more pairs of lateral fins 12 connected together by inner longitudinal portions 14 with recesses 15 to embrace the pipe; in which case there would be a reduced number of crimped joints in the length of the radiator. In fact, between any two crimped joints the sheet metal unit may be of various shapes and sizes.

The same method of attachment may be employed with one crimped joint for each lateral flange. In Fig. 7 for example, the sheet metal is in the form of flat plates 19 with (or without) flanges 20 on their outer edges approximately closing the space between them. Each plate 19 has an inner flange 21 with a recessed .portion 22 embracing the pipe 11. The opposite halves are fastened together by crimped joints 16.

Fig. 8 illustrates another form of sheet metal unit similar to that of Fig. 3 but compressed laterally to present for each unit a pair of outwardly projecting ribs 23 with a depression 24 between them. This forms, in fact, a secondary corrugation which may be of any desired depth, extending in the extreme case clear-to the pipe 11.

The sheet metal units may be set at any deslred spacing along the pipe according to the use to which the apparatus isvto be put. Generally the pipe and the sheet metal structure are of copper, for which the crimping method is particularly well adapted.

For some uses it is desirable to coat the radi ator with solder or tin by dipping, and the coating will assist in holding the parts together. The crimped joints are shown extending throughout the length of the inner edges of the sheet metal units, excepting the recessed portions. But for some uses it will be suflicient to crimp the parts together for less than the full length, as for example, at the top and 'bottom only. By extending the crimped joint along the full length of the vertical edges of the sheet metal units I secure a multiple-ply structure which) adds considerably to the stifi'ness of the radiator and permits the use of very thin metal.

Various other modifications may be made by those skilled in the art without departing from the invention as defined in the following claims.

1. A radiator including in combination a heating element and an extended area structure comprising pieces of sheet metal with edge portions applied to the heating element and crimped together.

2. A radiator including in combination a heating element and an extended area structure applied thereto comprising pieces of sheet metal at opposite sides embracing the heating element and having edge portions which are recessed to embrace the heating element and are crimped together.

3. A radiator including in combination a heating element and an extended area structure applied thereto comprising sheet metal units one at each side forming a pair of transverse fins connected at the outer side and having inner longitudinal portions at opposite sides of and embracing the heating element, said inner longitudinal portions having their vertical edges crimped together.

4. A radiator having a heating element and an extended area structure consisting of units of sheet'metal at opposite sides of the heating element forming fins with spaces between them and having edge portions in said spaces applied to the heating element at intervals in its length, which edges are crimped together to secure the fins to-the heating element.

5. A radiator including in combination a heating element in a plurality of substantially parallel sectionsand an extended area structure applied thereto comprising pieces of sheet metal applied to opposite sides of said heating element and united by crimped joints between said sections and also from the outer edges of the sheets to the adjacent sections. 1

6. A radiator including in combination a heating element and an extended area structure having edge portions applied to the heating element and fastened thereon by a crimped joint extending from the outeredge of said structure to the heating element.

7. A radiator including in combination a heating element and an extended area structure having edge portions applied to the heating element and crimped together close to the point of such application. a

In witness whereof, I have hereunto signed my name.

JOHN D. SOEHNER. 

